/* roulang page: index */
:root {
      --primary-red: #E63946;
      --primary-red-hover: #C1121F;
      --dark-charcoal: #1D1D1F;
      --dark-charcoal-light: #2B2B2F;
      --track-white: #F8F9FA;
      --victory-gold: #F4A261;
      --victory-gold-light: #F6B83D;
      --data-blue: #457B9D;
      --success-green: #2A9D8F;
      --warning-orange: #E76F51;
      --gray-light: #EAECEE;
      --gray-border: #E5E7EB;
      --gray-text: #9CA3AF;
      --white: #FFFFFF;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      --font-mono: 'DIN Alternate', 'SF Mono', 'Menlo', monospace;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.10);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --transition: all 0.25s ease;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--track-white);
      color: var(--dark-charcoal);
      line-height: 1.7;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button, input {
      font-family: inherit;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--white);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      z-index: 1000;
      height: 72px;
      display: flex;
      align-items: center;
      transition: box-shadow 0.3s;
    }

    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }

    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 24px;
      color: var(--primary-red);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--primary-red);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13.5 2.5c-1.1 0-2 .9-2 2v2.5c-2 0-3.5 1.5-3.5 3.5v5c0 2 1.5 3.5 3.5 3.5h5c2 0 3.5-1.5 3.5-3.5v-5c0-2-1.5-3.5-3.5-3.5v-2.5c0-1.1-.9-2-2-2h-1zM12 8.5h5c1 0 1.8.8 1.8 1.8v5c0 1-.8 1.8-1.8 1.8h-5c-1 0-1.8-.8-1.8-1.8v-5c0-1 .8-1.8 1.8-1.8z"/></svg>') no-repeat center;
      mask-size: contain;
      -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13.5 2.5c-1.1 0-2 .9-2 2v2.5c-2 0-3.5 1.5-3.5 3.5v5c0 2 1.5 3.5 3.5 3.5h5c2 0 3.5-1.5 3.5-3.5v-5c0-2-1.5-3.5-3.5-3.5v-2.5c0-1.1-.9-2-2-2h-1zM12 8.5h5c1 0 1.8.8 1.8 1.8v5c0 1-.8 1.8-1.8 1.8h-5c-1 0-1.8-.8-1.8-1.8v-5c0-1 .8-1.8 1.8-1.8z"/></svg>') no-repeat center;
      -webkit-mask-size: contain;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-menu a {
      font-weight: 500;
      font-size: 15px;
      color: var(--dark-charcoal);
      position: relative;
      padding: 4px 0;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-red);
      transition: width 0.2s;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--primary-red);
    }

    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      color: var(--dark-charcoal);
      cursor: pointer;
    }

    /* 首屏 Hero */
    .hero {
      background: linear-gradient(135deg, #1D1D1F 0%, #2B2B2F 100%);
      padding: 120px 0 80px;
      position: relative;
      overflow: hidden;
      color: var(--track-white);
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 2px, transparent 2px, transparent 8px);
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
      position: relative;
      z-index: 2;
    }

    .hero-text {
      flex: 1 1 55%;
    }

    .hero-text h1 {
      font-family: var(--font-title);
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .hero-text h1 span {
      color: var(--primary-red);
    }

    .hero-sub {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 32px;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 24px;
    }

    .btn-primary {
      background: var(--primary-red);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .btn-primary:hover {
      background: var(--primary-red-hover);
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(230,57,70,0.3);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-red);
      color: var(--primary-red);
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: var(--primary-red);
      color: white;
    }

    .hero-trust {
      display: flex;
      gap: 16px;
      font-size: 13px;
      opacity: 0.85;
    }

    .hero-image {
      flex: 1 1 45%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-card);
      min-height: 320px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      position: relative;
    }

    /* 数据看板 */
    .stats-section {
      padding: 80px 0;
    }

    .section-title {
      font-family: var(--font-title);
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 40px;
      text-align: center;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 38px;
      color: var(--primary-red);
      font-weight: 700;
    }

    .stat-label {
      color: var(--dark-charcoal);
      margin-top: 8px;
      font-weight: 500;
    }

    /* 服务矩阵 */
    .services-section {
      padding: 80px 0;
      background: var(--gray-light);
    }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }

    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(230,57,70,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    /* 对比优势 */
    .compare-section {
      padding: 80px 0;
    }

    .compare-grid {
      display: flex;
      gap: 48px;
      align-items: center;
    }

    .compare-image {
      flex: 1;
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      border-radius: var(--radius-card);
      min-height: 360px;
      position: relative;
    }

    .compare-table {
      flex: 1;
    }

    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid var(--gray-border);
    }

    .green-check {
      color: var(--success-green);
      font-weight: 600;
    }

    .gray-cross {
      color: var(--gray-text);
    }

    /* 流程 */
    .steps-section {
      padding: 80px 0;
      background: var(--white);
    }

    .steps-flex {
      display: flex;
      justify-content: space-between;
      text-align: center;
    }

    .step-item {
      flex: 1;
    }

    .step-number {
      font-size: 48px;
      font-weight: 700;
      color: rgba(230,57,70,0.2);
      font-family: var(--font-mono);
    }

    /* FAQ */
    .faq-section {
      padding: 80px 0;
      background: var(--track-white);
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq-item {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 16px 24px;
      box-shadow: var(--shadow-card);
    }

    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: #4b5563;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }

    /* 注册区 */
    .register-section {
      background: var(--primary-red);
      padding: 80px 0;
      color: white;
      position: relative;
    }

    .register-form {
      display: flex;
      gap: 16px;
      max-width: 600px;
      margin: 32px auto 0;
    }

    .register-form input {
      flex: 1;
      padding: 14px;
      border-radius: var(--radius-btn);
      border: none;
    }

    .btn-gold {
      background: var(--victory-gold);
      color: var(--dark-charcoal);
      border: none;
      padding: 14px 28px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      cursor: pointer;
    }

    .btn-gold:hover {
      background: var(--victory-gold-light);
    }

    /* 页脚 */
    .footer {
      background: var(--dark-charcoal);
      color: var(--gray-text);
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    @media (max-width: 1024px) {
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: repeat(2,1fr); }
      .compare-grid { flex-direction: column; }
      .faq-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; flex-direction: column; position: absolute; top:72px; left:0; background:white; width:100%; padding:20px; }
      .nav-menu.open { display: flex; }
      .menu-toggle { display: block; }
      .hero-grid { flex-direction: column; }
      .hero-text h1 { font-size: 30px; }
      .steps-flex { flex-direction: column; }
      .register-form { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }